The city will be unable to provide each of the public schools with its own full-time math coaches as planned this fall because there’s a shortage of available experts, Schools Chancellor Joel Klein said yesterday.

Klein said some schools will have to share coaches.

“We’re going to have coaches, but there may not be [one for each school]. There may have to be one for two schools or something like that,” Klein said after attending a training session at the School of the Future for more than 200 new teachers recruited from across the country.

The coaches are a critical component in training new teachers on the new math and English programs being implemented in 800 schools, as announced by Mayor Bloomberg and Klein earlier this year.

The chancellor said more schools will have their own full-time literacy coaches.

Despite math staffing woes, Klein said he was optimistic that the Department of Education will implement the reforms needed to begin the sweeping transformation of the public school system – which includes better teacher training. He said the coaches are now being trained on how to teach the instructors.

He told the new recruits that there will be more one-on-one help for teachers and no more “listening to boring lectures.”

Klein described the 10,000 new teachers hired this year as “the most drastically successful recruitment effort” in the city’s history.

“It reflects the incredibly hard work done by our people,” he said. “It’s all about the excitement about what’s going on in our city school system.”

But despite the ambitious effort, Albany recently approved Klein’s request to hire 3,000 unlicensed teachers for the upcoming school year and 1,500 the following year because there’s a shortage of certified teachers in hard-to-staff subjects such as math, science, foreign languages and special education.

More than one-quarter of city teachers this year flunked the basic state license exam – the Liberal Arts and Science Test – which they must pass in order to be accredited.

Recruiters from the department’s Excelsior teacher-recruitment team said there’s also a shortage of physical-education teachers.

But there’s been progress. The percentage of unaccredited teachers is expected to drop to 3 percent from 12 percent two years ago.

And the city is doing a better job of outside recruiting – more than 75 percent of the Excelsior program hires are from outside the region.

STATE OF OUR SCHOOLS

* The city is replacing 10,000 teachers this year – including more than 5,000 from retirement – the biggest recruitment drive ever.

* Because of staff shortages in key subjects, the state is allowing the city to hire 3,000 unlicensed teachers to fill vacant positions in math, science, foreign language, bilingual and special education.

* Some schools also will have to share math coaches because there’s shortage of math experts to cover every school.

* The city is doing a better job of outside recruiting – more than 75 percent of teachers hired through the new Excelsior program are from outside the metro area, from as far away as California and Nevada.